Method of removing dust while machining cylinders



Nov. 7, 1933; K. w. CONNOR 1,934,226

METHOD OF REMOVING. DUST WHILE MACHINING CYLINDERS Filed April 3, 1.933 2 Sheets Sheet l INVENTOR. ffz'r/k, 14460272707? ,5:

ATTORNEYS.

v zwmm Nov. 7, 1933. K. w. CONNOR METHOD OF REMOVING DUST WHILE MACHINING CYLINDERS Filed April 3, 1933 2 Sheets-Sheet 2 ATTORNEYS. I

Patented Nov. 7, .1933 i T n UNITED STATES PATENT OFFICE 2 1,934,226 METHOD OF REMOVING DUST MACHINING CYLINDERS Kirke W. Connor, Detroit, Mich, assignor to Micromatic Hone Corporation, a corporation of Michigan I Application- April 3', 1933. Serial No. 664,225 13 Claims. (CL 51 278) My invention relates to method and means for. be led into an air arrester where the residue scavenging the residue. produced in a machinis deposited and the air cleaned. ing operation and particularly to a method and Accordingly, the main objects of my invention means for retaining the inner surface of an are; to provide a method and means for prea automotive engine'clean and free fromresidue venting the residue produced when cylinders 00 produced in a machining operation when boring, are machined from dropping into the engine F grinding and the like, through a system of presblock; toprovide a blower which is attachable sure and air flow within the engine and outto an opening of an engine block to introduce wardly oi the cylinder in which the tool is a large volume of air therein. to have it flow 10 operating. upwardly out of the cylinder being 'machined;.to

Attempts have been made heretofore to employ provide a connector in extension of the cylinvacuum as'a scavenging means .ior the residue der for conducting the air and residue from produced during the; machining operation of the engine block; to provide means for subcylinders of engines and-otherwise but,- in view stantially-vsealing the cylinders not being operof the small pressures developed and the small ated upon against an outflow of air; to proamount of air flow, little success was attained vide a methodwhereby the application of air in preventing the residue from dropping within to the inner; surface ofan engine block prethe engine. vents any dust, grime; and residue from falling My" present vention relates to a method and therein during, the time the block is being,ma-

means for producing a much greater flow of chinedor otherwise operated on; and, in genair about the tool bydirect pressure ratherthan eral, to provide a. method and means for scavby a suction action, the amount ct'air flow en ingithe residue produced during a machining and: the pressure being .materially' greater. operation, which is simple inattachment, leco- When the-machined article is an-- engine block nomical ofemployment "and positive in operflwmen is herein illustrated and will be deation.

scribed}, the block is substantially sealed' by the C Other objects and features of novelty of my attachment 'or the pan and the plugging. of invention will lie-either specifically pointed out the cylinders other than the one' to be ground, or willfbecome apparent when referring, for a An air propelling means in the naturecf a blow--- better understanding of my invention, to the I01- er is attached toan opening, preferably one of lowing description taken in conjunction with the the' cylinders. In this manner, a large volume accompanying drawings, wherein: a 1 of airis supplied to the area withinthe engine; l-is-a'view, partly in' section and partly some of which may escape about the cracks :inelevation, or an engine block having a blower thereof, sufllclent volume and ;pressure' being systememployed-therein which embodies feasupplied so that :the major portion of thefair ture's ot-myinvehtion, 7

be ground, must enterthe inner area of the a is forced out of. the cylinder'which is ma- Fig, 2 an enlarged sectional view of the chined. I structure illustrated in-Fig. 1, taken on the line The advantage of this'system over a vacuum 24-2 thereof,. V Y system willbe-readily apparent:.-slnce the; out Fig. =3; is a sectional viewof the structure flow of an will tendto' clean the inside oftheillustratedinFig- 2 k n on the line 3-3 there- 95 surface ofzthe engine and will prevent any particle entering the innergarea. This is directly g-A'is-sa broken view, partly in sectionand to of Wm system sitestatistician?stirs wherein the air sucked from the cylinder to, h boring bar illustrated therein, I v

7 s Fig. 5 is a sectional view of the structure ilblock through adjacent cylinders or through the bottom, when, the pan is removed. The; lustratedmFig. 4, taken on thehne 55 thereof,

\ 1 Fig. 6 is a plan-view, partly in section, of a m system ehmmates any iP t sealing element which may be employed to sealsoever of dust, grime and machining residue the cylindersrand 105 from l s the'engme k" Them t 7 is a sectional view of the structure ilduced c we block by the vblower may be -l- 'lustrated m Fig. 6, taken on the line i-"z thereof. tered orstrained in any well known manner. pm 1 have ll t t an engine cylinder The air l avin the cylinder may conducted block 11 having cylinders l2, i3, 14, 1'5, 16 and a exteriorly of the building or preferably may 17, andcontaining the crankshaft (not shown) 1 and having the pan 18 loosely bolted thereon by into any suitable device and I have herein ilseveralbolts 19. In cylinders 14, 15 and 16 I lustrated a dust arrester 54, to which the hose have illustrated rubber balls 21 inserted therein 53 is attached, for separating the residue and for to substantially seal the walls of the cylinders. discharging the cleaned air back into the room. The balls are preferably made of sponge rubber A container 55 of the arrester 54 collects the to be extremely resilient and contractable. In residue which may be emptied from time to time. cylinder 13 I have illustrated a clamping rod 22 In this manner. the machine may be employed for a cutting machine 23 for clamping the maon the floor of the garage without any dust or chin t t l ck- A s a in m nt 24 extends grit being blown around the room which would over therod 22 and engages the Side Of t e otherwise occur in view of the pressure set up by cylinder 13 and will be described more fully the blower 25. hereinafter. Referring to Figs. '4 and 5, I have illustrated The cylinder 17 a 8 b ow unit 25 Supp a further extension of the invention .as applied th n. P e y y a trun t d oni al nozzl to a grinding operation. It will be understood 6 whi 18 ap to fit any S of Cylinder. that after the boring operation the cylinders are p y in the automotive Passenger r so rough that it is necwsary to grind them to Th blowe is pr f ra ly mad of aluminum so produce a. high polish to prevent the wearing 85 o be l gh weight d is P dw t of the pistons and rings which contact with the ndle 27 y which it may be carried and-pos cylinder walls. The structure herein shown and tlo cylinders Otherwise 011 the ell il e described is similar to that found in the coblock. A motor 28 drives a propeller 29 which p ding application of myself a d Fred Kern, draws a i to an p n 31 and forces t Serial No. 512,719, filed January 31, 1931 with through the nozzle 26 into the engin b oe the exception that the air is forced through The opening 31 may be cove ed y e Strainer the engine by positive means rather than sucked, 0 removing g it and particl from e all therefrom by a vacuum. system. The advantage fore being introduced within the block. When of this pressure system has been pointed out the cylinders 13, 14, and 16 are sealed and h rei ab v the pan 18 is attached to the block; the blower Referring to Fig. 4, a collar 56 is disposed in wi bu D 8 Pressure 01 within the continuation of the engine cylinder, attached to cy nd a d t a r p rti of the air will a manifold 57 which is clamped on the top of 105 be vented t ou cy de which is the One the engine block by suitable clamping means 58. to be machined. It is to be understood that A cover 59 is disposed upon the top of the colai'ter the machining of the cy nder 2 this lar 56 having an operating shaft 61 extending cylinder w be closed y Sealing el e therethrough provided with a bifurcated extenor 24 and a cylinder to be m c will then sion 62 in which a collar 63 is swingably mounted 110 be p n ha he al will flow h 8 having slots 64 therein which engage trunnions After the first five cylinders have been machined, 65 on a honing tool 66. Suitable springs 6'7 and th blower will be moved tonne of t e machined 68 retain the weight of the honing tool and the cylinders and t e cy 17 will then be driving motor attachable through a hexagon chined. end 69 on the shaft 61. The shaft having the The machine 23 herein shown, is o the boring sealing means 71, the tool and the collar are type having a downwardly movable arbor 32 pr more particularly described in my above menvided with a borin o l 3 011 its end which is tioned co-pending application. It will be noted,

' driven in rotation throu h Shaft 34 during h when adjustment is to be made of the honing downward movement'of the bar 32. A motor 35 tool, th t th ft is reversely turned to disi mp yed for driving the r 34 in timed engage the trunnion 65 from the slot 64 to tion tothe driving of the arbor 32 downwardly have the cover 59 removed so that the adjusting through the cylinder. Suitable control handles head of the tool 66 is available to the operator. 36, and 38 are employed for re u ting the re When a vacuum system was employed, the air the Speeds d Operation of e arbor 32 was no longer drawn through the engine block and tool 33. and any dust, dirt or residue could fall within After the machine 23 is clamped to the block the block while the operator set oil? the adjusta collar 39 is disposed about the ends of the t on th t arbor 32 sealed to the shoulder 40 0f the mach In the, present construction, when the cover is and in extension of the cylinderlz. The collar 1 removed from the collar 56 and adjustment is 39 15 Preferably made 01 th'lee'eeetlohs 41, made to the-tool, a strong blast of air is blow- 43 which are hinged together at 44 and 45- By ing upwardly out ofthe engine block to prevent having the collar so hinged it can readily be any of the residue, dust or grime from falling disposed about the arbor 32. After the collar is within the engine block when disturbed by the so disposed it is drawn tightly about the shouloperator. Whenthe collar and shaft are atder 40 on the machine and sealed thereto by a, tached as illustrated in the figure, the air is sealing material 46 which may be of cork, felt passed out through the manifold 57, the hose for similamsealing material.

A locking clamp 53 into the air arrester 54 or other suitable '47 is secured to the section 43 and is provided container,

with an aperture which projects ov r D 48 n In Figs. 6 and 7, I have shown'a sealing means tion 41 to retainthe two sections in related which; may m loy in lieu oi" the rubber-balls position, locked about the shoulder hose 53 is engaged.

the edges of which project withina slot 51 of a such quality and thickness as the 21 above referred to. I have illustrated a spring machine. A notch 49 is provid in h of h steel strap 72, the ends of which are in oversections 41 and 43 which, when the is m lapping relation and over which a rubber elelocked position. Produces a-lectangulal' aperture ment 73 maybe stretched. The rubber is of to be readily terminal connector 52 with whicha disch e stretchable by the bias in the spring strap 72 so that the spring strap may be reduced in diameter through an application of pressure on 150 The hose 53 may project out of the building or the exterior surface of the rubber and inserted within the cylinder to have the metal band-expand to force the rubber into intimate engagement with the side of the cylinder wall. In this manner, the sealing element may be employed on any size of cylinders employed on passenger automotive vehicles, to be expanded from substantially a two inch to substantially a 3 /2 inch diameter. a

In Fig. 6, I have illustrated the element as having a full face to be employed in holes 14,,-

15 and 16, while in Fig. '7, I have illustrated an aperture 74 as being "provided in the central portion of the face to be employed with the clamping rod 22 and the cylinder 13. The rubber may be stretched to have the rod pass through the aperture 74 and thereafter the spring strap 72 may be pressed together to reduce the-diameter beyond that of the cylinder so that it may be inserted therein, after which the release of the strap causes it toexpand and force the rubber into engagement with the cylqinder wall.

While I have specifically mentioned rubber balls and the device illustrated in Figs.- 6 and'7 asbeing means for sealing thecylinders, it is to be understood that any type of means such as wedges, ovals and the like may be utilized,

, preferably constructed to be disposed below the top of the engine block so that it may be dressed or machined without any danger of the'residue falling within the engine. I

It will be noted that, when machining cylinders of an engine block either by a boring operation or a grinding operation, none of the residue produced thereby will fall within the block onto the crank shaft or the pan becauseof the air pressure system set up within the block by the blower. The air introduced to the block is preferably strained so that no' dust is drawn into the blower and forced into the block where it would collect upon the oil film on the inner surface of the engine. All of the holes are substantially sealed so that practically all of the air is forced out of the cylinder being machined and away from the block and tool. I preferably employ a dust arrester connected to the outlet conduit for freeing the air from the residue so that the system may be employed anywhere without disturbing the airin'the room. By providing an internal air pressure in the engine no residue whatsoever can enter the internal parts thereof in view of the outflow of air at any such place of entrance. While I have particularly specified engine blocks as being the primary use of the system, it is to be understood that similar apparatus, that is to say, apparatus wherein machining is done where the residue could fall within the apparatus, could have the system adapted to be successfully employed therewith. Accordingly, the method is not to be presumed to be limited to engine blocks alone, although developed for that particular purpose.

While I have described and illustrated but a single embodiment of my invention, it will be apparent to. those skilled in the art that various changes, omissions, additions and substitutions may be made therein without departing from the spirit and scope of my invention as set forth in the accompanying claims.

I claim as my invention:' 1. The combination with an engine block having a plurality of cylinders, means for substantially sealing the block at all points except two of the cylinders, means for introducing air into :cylinder;

said block in one of said cylinders which is vented out of the remaining open cylinder during the machining of said open cylinder.

2. The combination with an engine block having a plurality of cylinders, means for substantially sealing the block-at all points except two of the cylinders, propelling means connected to one of the cylinders for-introducing a flow of air through the block and out the open cylinder during the machining of said open cylinder.

3. The combination with an engine block having a plurality of cylinders, means for substantially sealing the block at all points except two of the cylinders, propelling means connected to one.

of the cylinders for efiecting a flow of air through the block and out the open cylinder during the machining of said open cylinder, and means for conducting the air away from the cylinder and the machining means.

4. The combination with an engine block having a plurality of cylinders, means for substantially sealing the bloclr at, allpoints except two of the cylinders, propelling means connected to one of the cylinders for producing a flow of air through the block and out the open cylinder during the machining of said open cylinder, means for conducting theair and residue away from the cylinder and the machining means, and

an air arrester connected to'said conducting meansv for separating the residue from the air.

5. :The combination with an engine block having a plurality of cylinders, means for substantially sealing said block at all points except at two of the cylinders, air propelling -means for producing a pressure within the block through one of the cylinders which causes a material flow of air through the remaining cylinder during the machining. of said remainingcylinder, and means for; sealing the end' of the cylinder being machined having an outlet from which the air is conducted away from said 6. The combination with an engine block having a plurality of cylinders, means for substan tially sealing said block at all, points exceptat twd of the cylinders, air propellingmeans for producing a pressure within the block through one of the cylinders which causes a material flow'of air through the remaining cylinder during the machining of said remaining' cylinder, an element for sealing-the end of the cylinder being machined having an aperture through which the air is conducted away from the cylinder, and an air arrester for separating the residue from the air conducted therefrom.

'7. The method of machining-the cylinders of an engine block, which includes the steps: of

substantially sealing the block at all points exing a pressure of air within the cylinder to pro videa continuous and material flow of air out of the cylinder being machined, and of conducting the air'and the residue from .the cylinder away from the block; 1

9. The method of machining a cylinder of substantially sealing the block at all points ex- I cept the cylinder being worked upon; of producing a pressureoi air within the cylinder to provide a continuous and material flow oi. air out of the cylinder being machined, of conducting the air and .the residue from the cylinder away from the block, and'ot thereafter separating theresidue from the air.

10. The method of machining a cylinder of an engine block which includes the steps of'substantially sealing the engine block at all points except the cylinder being worked upon; of introducing' air under pressure into the cylinder; and of machining the cylinder while airis flowing outwardlytherethrough.

11. The method of machining a cylinder 0! an engine block, which includes the steps, of substantially'sealing the engine block at all points except the cylinder being worked upon; of introducing air under pressure into the cylinder; of filtering said air before such introduction; of machining the cylinder while air is flowing 1,934,226 engine block, which includes the steps; 0':

outwardly therethrough, and of conducting said air away from said cylinder.

12. The combination with an air supply system which causes an outflow of air through a cylinder which is being machined, of a machining device, a flexible collardisposed about the machining portion of said device for sealing the device. in extension of said cylinder, and air conducting means associated withsaid flexible collar for conducting the air away from said device.

13. The combination with an air conducting system for producing an outflow of air to a cylinder being machinedpf a device for machining said cylinder, anchoring means for said device extending through an adjacent cylinder, and meansfor sealing said anchor means in said device comprising an expansiblerubber disc having an HRKE W. CONNOR. 

